Power plants – Pressure fluid source and motor – Pulsator
Patent
1989-09-21
1992-03-10
Look, Edward K.
Power plants
Pressure fluid source and motor
Pulsator
60538, 192 358, 192 83, F15B 700
Patent
active
050940791
ABSTRACT:
A master cylinder assembly and a motor vehicle power assist actuator utilizing the master cylinder assembly. In one form of the invention, a clutch actuator is provided in which the clutch may be actuated in the usual manner by depression of the clutch pedal to move the piston in the master cylinder assembly under the urging of the push rod or, in a power mode of the actuator, movement of the gear shift lever of the vehicle is sensed by a logic module whereupon the electric motor of the master cylinder assembly is energized in a sense to move the ball screw to apply a power assist force to the annular outer periphery of the rear end of the piston and thereby effect disengagement of the clutch. In another embodiment of the invention, the signal to the logic module to enable energization of the motor is generated by a switch connected to the clutch pedal so that the force for disengaging the clutch includes a manual force applied by the push rod and a power force applied by a ball screw. In a further embodiment of the invention, the master cylinder assembly is utilized in a power assist brake actuator wherein a proportional potentiometer senses the pivotal movement of the brake pedal and provides a power assist, via the logic module, to the ball screw that is proportional to the extent of pivotal movement of the brake pedal.
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Bendix Hydro-Max Power Brake brochure.
Alfred Teves booster literature.
Automotive Products power hydraulic booster literature.
Popular Science, Mar. 1988 issue, pp. 64-65.
Leigh-Monstevens Keith V.
Mabee Brian D.
Automotive Products plc
Look Edward K.
Mattingly Todd
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